package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {

    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 分类分页查询
     *
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult page(CategoryPageQueryDTO categoryPageQueryDTO) {
        // 设置分页参数
        PageHelper.startPage(categoryPageQueryDTO.getPage(), categoryPageQueryDTO.getPageSize());

        // 查询数据 自动添加limit关键字分页
        Page<Category> page = categoryMapper.pageList(categoryPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 根据类型查询分类
     *
     * @param type
     * @return
     */
    @Override
    public List<Category> getByType(Integer type) {
        return categoryMapper.getByType(type);
    }

    /**
     * 修改分类
     *
     * @param categoryDTO
     */
    @Override
    public void update(CategoryDTO categoryDTO) {
        Category category = new Category().builder()
                .id(categoryDTO.getId())
                .type(categoryDTO.getType())
                .name(categoryDTO.getName())
                .sort(categoryDTO.getSort())
                .build();
        categoryMapper.update(category);
    }

    /**
     * 启用禁用分类
     *
     * @param status
     * @param id
     */
    @Override
    public void enableOrDisable(Integer status, Long id) {
        Category category = new Category().builder()
                .id(id)
                .status(status)
                .build();
        categoryMapper.update(category);
    }

    /**
     * 新增分类
     *
     * @param categoryDTO
     */
    @Override
    public void addCategory(CategoryDTO categoryDTO) {
        Category category = new Category();
        // 属性拷贝
        BeanUtils.copyProperties(categoryDTO, category);
        // 分类状态默认为0禁用
        category.setStatus(StatusConstant.DISABLE);

        categoryMapper.addCategory(category);
    }

    /**
     * 根据id删除分类
     *
     * @param id
     */
    @Override
    public void deleteById(Long id) {
        // 查询当前分类是否关联了菜品，如果关联了菜品就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if (count > 0) {
            // 当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        // 查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if (count > 0) {
            // 当前分类关联了套餐，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }

        categoryMapper.deleteById(id);
    }
}
